I don’t like anyone stealing anybody’s designs, but do you really think he can claim ownership of a design which is just a reproduction of Nintendo’s characters?
I’m no trademark expert, and perhaps Nintendo would have a claim as you suggest, but the renderings are an original take on the characters and the chip design itself is original, too. Far from “just a reproduction,” but I take your general point, and my use of “owns” was likely too strong of a word. My primary purpose was just to convey that these aren’t the real thing, in terms of what people may have seen offered on here, and the seller is benefitting off of someone else’s efforts, almost certainly without permission.